Sources of Variation in the Stable Isotopic Composition of Plants

Marshall, John D.; Brooks, J. Renée; Lajtha, Kate

doi:10.1002/9780470691854.ch2

Cited by 256 publications

(271 citation statements)

References 206 publications

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“…Furthermore, elevated organic matter concentrations are associated with enhanced transport of 55 nutrients and heightened biological oxygen demand, thus leading to the degradation of water quality 56 Addressing this matter, compound-specific isotope analysis (CSIA) has the potential to facilitate 62 identification of organic matter contributions to riverine sediments by exploiting differences in the 63 stable isotopic composition amongst different plants at either the species or plant functional type level 64 (Marshall et al, 2007). Of particular interest in this study are the carbon (δ 13 C) and hydrogen (δ 2 H) 65 stable isotopic compositions of plant n-alkanes.…”

Section: Introduction 43mentioning

confidence: 99%

Apportioning sources of organic matter in streambed sediments: An integrated molecular and compound-specific stable isotope approach

Cooper

Pedentchouk

Hiscock

et al. 2015

Science of The Total Environment

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12We present a novel application for quantitatively apportioning sources of organic matter in streambed 13 sediments via a coupled δ 2 H and δ 13 C compound-specific isotope analysis (CSIA) of leaf wax n-14 alkane biomarkers using a Bayesian mixing model. Leaf wax extracts of 13 plant species were 15 collected from across three sub-environments (aquatic, bankside and terrestrial) and four plant 16 functional types (trees, herbaceous perennials and C 3 and C 4 graminoids) from the agricultural River 17Blackwater catchment, Norfolk, UK. Nine isotopic ratio and n-alkane chain length fingerprints were 18 derived, which successfully differentiated 93% of individual plant specimens by plant functional type. ranging from -259‰ to -221‰) providing the largest contrasts. The δ 13 C values provided strong 22 distinction between C 3 and C 4 plants, and successfully discriminated between natural and cultivated 23 vegetation. n-Alkane chain length metrics complemented hydrogen and carbon isotope data by 24 2 discriminating between aquatic, bankside and terrestrial sub-environments. Neither δ 2 H nor δ 13 C 25 could uniquely identify plants based on sub-environment, emphasizing a stronger plant 26 physiological/biochemical rather than environmental control over isotopic differences. Bayesian 27 source apportionment results for 18 streambed sediments collected between September 2013 and 28March 2014, revealed considerable temporal variability in organic matter sources. Median organic 29 matter contributions ranged from 22-52% for trees, 29-50% for herbaceous perennials, 17-34% for C 3 30 graminoids and 3-7% for C 4 graminoids. The results presented here clearly demonstrate the 31 effectiveness of an integrated stable isotope and molecular approach for quantitatively apportioning 32 plant specific organic matter contributions to streambed sediments. Future research could investigate 33 whether soils under particular vegetation types are tagged with unique δ 2 H and δ 13 C signatures that 34 would allow these isotopes to be used as direct land-use specific soil erosion tracers. 35 HIGHLIGHTS 36 Organic contributions from trees, herbs and C 3 /C 4 graminoids are apportioned. 37  δ 2 H provides strong discrimination between plant functional types. 38  δ 13 C provides strong contrasts between C 3 and C 4 plants. 39  δ 2 H and δ 13 C values were not influenced by sub-environment. 40  n-Alkane chain length metrics compliment isotopic discrimination. 41

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Section: Introduction 43mentioning

confidence: 99%

Apportioning sources of organic matter in streambed sediments: An integrated molecular and compound-specific stable isotope approach

Cooper

Pedentchouk

Hiscock

et al. 2015

Science of The Total Environment

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“…En este sentido, todos los d 13 C (Fig. 22) se encuentran en el rango de las plantas C 3 terrestres, pero también está en el rango de la materia orgánica terrestre (Marshal, Brooks y Lajtha 2007;Garten et al 2007). El hecho de que el d 13 C sea el de las plantas C 3 terrestres es indicativo de una baja degradación de la materia orgánica vegetal original en el suelo utilizado como materia prima para el mortero.…”

Section: Caracterización Y Datación De Morterosunclassified

Tres arquitecturas altomedievales orensanas: Santa Eufemia de Ambía, San Xés de Francelos y San Martiño de Pazó

Pardo

Blanco-Rotea

Sánchez

2017

Arqueol. Arquitect.

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RESUMENEste artículo tiene como objetivo profundizar en el conocimiento arqueológico de las técnicas constructivas altomedievales del noroeste peninsular, y la dimensión social en las que éstas se enmarcan, a través del estudio comparativo de tres iglesias de la actual provincia de Ourense: Santa Eufemia de Ambía, San Xés de Francelos y San Martiño de Pazó. Para ello, partimos de un trabajo extensivo previo en el que se realizó una prospección arqueológica para documentar posibles restos de iglesias altomedievales. Se seleccionaron, entre otras, estas tres iglesias y se hizo una lectura veloz de sus paramentos combinada con la datación absoluta de los morteros de tierra de las fases altomedievales mediante Luminiscencia Ópticamente Estimulada y radiocarbono. Esta metodología, completada con una revisión historiográfica de cada edificio, nos permitirá observar de cerca las transformaciones en las técnicas constructivas que tienen lugar en esta zona entre los siglos IX y X y contextualizarlas en el marco más amplio de los estudios sobre arquitectura altomedieval en la península ibérica.Palabras clave: Lectura veloz; OSL; Radiocarbono; iglesias prerrománicas; Galicia; datación absoluta. ABSTRACTThis paper aims to explore from an archaeological point of view, the constructive techniques and their social implications in northwest Iberia during the early middle ages by means of the comparative study of three standing churches in the current province of Ourense: Santa Eufemia de Ambía, San Xés de Francelos and San Martiño de Pazó. Our departure point is a previous extensive architectural survey focused to identify early medieval church remains in the area, in which these three churches were selected for further study. Then we applied a speedy stratigraphical analysis of their walls combined with the absolute dating of the earth mortars from the early medieval phases through Optically Stimulated Luminescence and Radiocarbon. This methodology, complemented by a historiographical review of each building, will allow us to discuss the transformations in the construction techniques that took place in this area between the 9th and 10th centuries and to contextualize them in the broader framework of the studies on early medieval architecture in the Iberian Peninsula.

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“…Dissolved inorganic nitrogen in surface water samples of Temenggor Lake and Chenderoh Lake, Perak, M alaysia, reported as mean ± SD, n= 3. [24]. Other reported values of δ 13 C in the literature have shown that δ 13 C of phytoplankton and algae were in the range of -42 to -19 ‰ [25].…”

Section: Stable Isotopes δ 13 C and δ 15 N Of Fishmentioning

confidence: 99%

Stable Isotopes Approach to Infer the Feeding Habit and Trophic Position of Freshwater Fishes in Tropical Lakes

Yap

Muneera

Syakir

et al. 2016

IJEE

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Sources of Variation in the Stable Isotopic Composition of Plants

Cited by 256 publications

References 206 publications

Apportioning sources of organic matter in streambed sediments: An integrated molecular and compound-specific stable isotope approach

Apportioning sources of organic matter in streambed sediments: An integrated molecular and compound-specific stable isotope approach

Tres arquitecturas altomedievales orensanas: Santa Eufemia de Ambía, San Xés de Francelos y San Martiño de Pazó

Stable Isotopes Approach to Infer the Feeding Habit and Trophic Position of Freshwater Fishes in Tropical Lakes

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